Discovery of the NNE Ductile Shear Zone and Its Deformation Age Analysis of Tamusu Area, Inner Mongolia

详细信息   

• 责任者：Wu Fengping (No.3 Geological Team ; Bureau of Mineral Resources and Development ; Yantai 264003 ; China) ; Zhang Weijie
• 刊名：Xinjiang Geology
• 出版年：2012
• 卷期：30(2)
• 关键词：韧性剪切带 ; ductile shear zones ; 内蒙古 ; Inner Mongolia
• 页码：p.216-220
• 图表：2 illus., 1 table, 12 refs.
• issnNo：ISSN1000-8845
• isbnNo：CN65-1092/P

摘要

///NNE-trending ductile shear zone of Ta mu su is located at the boundary between on the eastern side of Talimu and on the west-north side of north China blocks collision- amalgamation zone.It extents in a nearly NNE direction with a length of 9 km and a width of 150～2500 m.Structural Styles,including folded mylonitic foliation,mineral lineation, rotational porphyroclast,“domino”structure and “mica fish”,indicate a dextral thrusting strike-slip. This ductile shear zone might occur at a metamorphic grade of green-schist facies, temperature at 300～500 ℃and pressure at 250～400MPa, The Values of differential structural stresses（～） are estimated at 93.7～116.5 ℃MPa,Strain rate（e） is 10＂17 sl（300℃） and 10～13 s～（500℃）.The main ductile shear zone deformation time formed between（256.0：～l.3） Ma and the Triassic by comprehensive evaluation,was formed by the late Variscan （Hercynian） movement.